linux-kernel - [PATCH v2 70/70] mm/mmap: Convert __insert_vm_struct to use mas, convert vma_link to use vma_mas

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 12 Jan 2021 11:12:40 -0500
From:   "Liam R. Howlett" <Liam.Howlett@...cle.com>
To:     maple-tree@...ts.infradead.org, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...gle.com>, Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        Jerome Glisse <jglisse@...hat.com>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v2 70/70] mm/mmap: Convert __insert_vm_struct to use mas, convert vma_link to use vma_mas_link()

Drop unused vma_store()

Signed-off-by: Liam R. Howlett <Liam.Howlett@...cle.com>
---
 mm/mmap.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index ce8857b9abd89..b4ed8be4899b8 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -514,21 +514,9 @@ static void vma_mas_link(struct mm_struct *mm, struct vm_area_struct *vma,
 
 static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma)
 {
-	struct address_space *mapping = NULL;
+	MA_STATE(mas, &mm->mm_mt, vma->vm_start, vma->vm_end - 1);
 
-	if (vma->vm_file) {
-		mapping = vma->vm_file->f_mapping;
-		i_mmap_lock_write(mapping);
-	}
-
-	vma_mt_store(mm, vma);
-	__vma_link_file(vma);
-
-	if (mapping)
-		i_mmap_unlock_write(mapping);
-
-	mm->map_count++;
-	validate_mm(mm);
+	vma_mas_link(mm, vma, &mas);
 }
 
 /*
@@ -538,9 +526,13 @@ static void vma_link(struct mm_struct *mm, struct vm_area_struct *vma)
 static inline void __insert_vm_struct(struct mm_struct *mm,
 				      struct vm_area_struct *vma)
 {
-	if (find_vma_intersection(mm, vma->vm_start, vma->vm_end))
+	MA_STATE(mas, &mm->mm_mt, vma->vm_start, vma->vm_end - 1);
+
+	if (mas_find(&mas, vma->vm_end - 1))
 		BUG();
-	vma_mt_store(mm, vma);
+
+	mas_set_range(&mas, vma->vm_start, vma->vm_end - 1);
+	vma_mas_store(vma, &mas);
 	mm->map_count++;
 }
 
-- 
2.28.0